160 tire for 3" wide 16" rim

ok so i got a set of the 13 spoke mag rims with the 16" rim thats 3" wide. I know the Metzler 160/80/16 fits but there on backorder. my question is who else makes a tire that size that will fit? Avon has a tire that size but they say it only fits 3.5-4.5". will that fit on a 3" rim? its the same size tire so...

Are you measuring inside or outside dimension? Inside is the proper dimension.
A 3.5" rim is the smallest I would run a 160 on, not saying you will, but it is a possibility that in a hard curve a wide tire on too narrow of a wheel will roll off the bead, which could lead to catastrophe.
A 160 (6.3") is slightly more than double the width of a 3" wheel.

We got the Avon Venom 160 size mounted on a 3.5 and it looks great, not cupped up and all tread is still usable even on the chopper. I am gonna use the same tire on my FXDX mags ( 3.5 width) which is the same wheel you are speaking of.